cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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time.c (1051B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *  PS3 time and rtc routines.
      4 *
      5 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
      6 *  Copyright 2006 Sony Corp.
      7 */
      8
      9#include <linux/kernel.h>
     10#include <linux/platform_device.h>
     11#include <linux/rtc.h>
     12
     13#include <asm/firmware.h>
     14#include <asm/lv1call.h>
     15#include <asm/ps3.h>
     16
     17#include "platform.h"
     18
     19void __init ps3_calibrate_decr(void)
     20{
     21	int result;
     22	u64 tmp;
     23
     24	result = ps3_repository_read_be_tb_freq(0, &tmp);
     25	BUG_ON(result);
     26
     27	ppc_tb_freq = tmp;
     28	ppc_proc_freq = ppc_tb_freq * 40;
     29}
     30
     31static u64 read_rtc(void)
     32{
     33	int result;
     34	u64 rtc_val;
     35	u64 tb_val;
     36
     37	result = lv1_get_rtc(&rtc_val, &tb_val);
     38	BUG_ON(result);
     39
     40	return rtc_val;
     41}
     42
     43time64_t __init ps3_get_boot_time(void)
     44{
     45	return read_rtc() + ps3_os_area_get_rtc_diff();
     46}
     47
     48static int __init ps3_rtc_init(void)
     49{
     50	struct platform_device *pdev;
     51
     52	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
     53		return -ENODEV;
     54
     55	pdev = platform_device_register_simple("rtc-ps3", -1, NULL, 0);
     56
     57	return PTR_ERR_OR_ZERO(pdev);
     58}
     59device_initcall(ps3_rtc_init);